Rajakumar, S. and Thirunakaran, R. and Sivashanmugam, A. and Gopukumar, S.
(2010)
Synthesis, Characterization, and Electrochemical Properties
of LiCrxNiyMn2−x−yO4 Spinels as Cathode Material for
5 V Lithium Battery.
Journal of the Electrochemical Society, 157 (3).
A333-A339.
ISSN 0013-4651
Abstract
Sol–gel assisted spinel LiCrxNiyMn2−x−yO4 0 x 0.4 and 0 y 0.4 has been synthesized. The thermal study of the
precursor was carried out by thermogravimetric and differential thermal analyses. Furthermore, the material has been subjected to X-ray diffraction, scanning electron microscopy, Fourier transform IR spectroscopy analysis, X-ray photoelectron spectroscopy, cyclic voltammetry studies, and electrochemical charge–discharge studies. The X-ray diffraction of LiCrxNiyMn2−x−yO4 matches well with the Joint Committee on Powder Diffraction Standard card no. 35-782, confirming the formation of a single-phase spinel.
Charge–discharge studies were carried out between 3 and 5 V to understand the electrochemical behavior of the undoped and
doped spinels. LiCr0.25Ni0.25Mn1.5O4 calcined at 850°C possesses a particle size of around 70 nm and exhibits an initial discharge
capacity of 105 mAh g−1 stabilizing at 98 mAh g−1 over the investigated 20 cycles. However, maleic acid derived
LiCr0.25Ni0.25Mn1.5O4 delivers a stable higher discharge capacity of 115 mAh g−1 over the investigated 20 cycles and is a promising 5 V cathode material.
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